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InformationalSplunk security contentRaven Tait +1

Windows File Association Modification via Ftype

This analytic detects the use of the `ftype` command to modify Windows file associations. Attackers can abuse this functionality to change how specific file types are handled, potentially redirecting legitimate file…

Description

This analytic detects the use of the `ftype` command to modify Windows file associations. Attackers can abuse this functionality to change how specific file types are handled, potentially redirecting legitimate file execution to malicious payloads. If confirmed malicious, this behavior may enable persistence, execution of unauthorized code, or evasion of security controls.

Detection logic

Detection requirements

Platform
Windows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
crowdstrike_processrollup2sysmon_eventid_1windows_event_log_security_4688

Known benign triggers

  • Legitimate users or administrators may run the ftype command to check or modify file associations. Filter alerts if used within authorized maintenance activities.

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